往复式管坯喷射沉积的模型建立及运动参数优化

MODELING AND OPTIMIZATION OF MOVEMENT PARAMETERS OF RECIPROCATING TUBULAR SPRAY DEPOSITING

介绍了基底往复式喷射成形制备大壁厚管坯的工艺原理,并对雾化锥流率的空间分布和单层沉积轨迹进行了研究,在此基础上建立了单层沉积的数学模型.针对此模型和沉积轨迹的螺旋特性,分析了模型参数(m_(max),a,d)和基底运动参数(w,v)对单层沉积特性的影响以及基底半径对单层沉积厚度的影响.通过对多旋转周期沉积轮廓叠加的单层沉积厚度的仿真,优化了管坯制备的运动参数(w,v).

Process principle of reciprocating spray forming large thick-waU tubular was analyzed. The distribution of the mass flux of spray cone and behavior of the deposit track of single layer were studied, a model of depositing single layer was established on the basis of these research. Aiming at the model and the helix characteristic of the deposit track, the influences of model parameters （mmax, a, d） and mandrel movement parameters （ω, v） on the deposit behavior, and the influences of mandrel radius on deposit thickness of single layer were analyzed. Through the simulation of the deposit thickness overlapped by the deposit profiles of multiple circumrotating cycles, the movement parameters （ω, v） of tubular spray forming were optimized.